//: concurrency/SimpleDaemons.java
// Daemon threads don't prevent the program from ending.
package concurrency;

import java.util.concurrent.*;

import static net.mindview.util.Print.*;

public class SimpleDaemons implements Runnable
{
    public void run()
    {
        try
        {
            while (true)
            {
                TimeUnit.MILLISECONDS.sleep(100);
                print(Thread.currentThread() + " " + this);
            }
        }
        catch (InterruptedException e)
        {
            print("sleep() interrupted");
        }
    }
    
    public static void main(String[] args)
        throws Exception
    {
        for (int i = 0; i < 10; i++)
        {
            Thread daemon = new Thread(new SimpleDaemons());
            daemon.setDaemon(true); // Must call before start()
            daemon.start();
        }
        print("All daemons started");
        TimeUnit.MILLISECONDS.sleep(175);
    }
} /*
   * Output: (Sample) All daemons started Thread[Thread-0,5,main] SimpleDaemons@530daa Thread[Thread-1,5,main]
   * SimpleDaemons@a62fc3 Thread[Thread-2,5,main] SimpleDaemons@89ae9e Thread[Thread-3,5,main] SimpleDaemons@1270b73
   * Thread[Thread-4,5,main] SimpleDaemons@60aeb0 Thread[Thread-5,5,main] SimpleDaemons@16caf43 Thread[Thread-6,5,main]
   * SimpleDaemons@66848c Thread[Thread-7,5,main] SimpleDaemons@8813f2 Thread[Thread-8,5,main] SimpleDaemons@1d58aae
   * Thread[Thread-9,5,main] SimpleDaemons@83cc67 ...
   */// :~
